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GeoGebra
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tangent is 90
Author:
shp
GeoGebra
New Resources
科赫雪花
椭圆内切圆链
平行線的判定
正方形雪花图案
斐波那契螺旋弧线(表格法-可动态调节)
Discover Resources
正9邊形
畢達哥拉斯定理
鉛筆畫圓
容積上升(立體、平面)
堆垛
Discover Topics
Rotation
Perimeter
Quadratic Functions
Linear Programming or Linear Optimization
Symmetry